Stairway is one of their best-known songs. It's one of these songs which are visiting cards of the bands - they play it everywhere (radio, tv). It might be a reason that some people are fed up with it, and just don't like it.
For me, it's a great song, but I don't think it's LZ's best.

Hm, don't you think it's a bit strange request? Maybe you should read an article from the official site? Or just find some information in the Internet? And then, if you need, verify them here? Hm?
I don't know, I'm just a Newbie, like you, but I think I'd do that firstly..